#根据分数定等级
print("输入的内容范围是0-100哦")
grade = float(input("输入你的分数："))
if grade>100 or grade<0:
    print("输入的分数不合理哟")
elif 0<=grade<60:
    print("不及格")
elif 60<=grade<85:
    print("良好")
elif 85<=grade<100:
    print("优秀")
